What is this product used for Probios Horse Treats are a lactose-free treat that are a source of direct fed microbials that help maintain digestion and a healthy body. Benefits Probios Horse Treats are a source of direct fed microbials in a lactose-free treat format. The direct fed microbials help maintain proper gut flora and help support gut absorption. Probios Horse Treats are for all breeds and all horses. The treats are apple flavored, a flavor horses love. How it works Since one direct fed microbial alone cannot provide all the required health benefits, Probios Horse treats contains two species of live Bacillus that can survive the treat manufacturing process: Bacillis subtilis and Bacillus licheniformis. As direct fed microbials, they promote breakdown and assimilation of nutrients while helping to maintain proper gut flora. Suggested Use Probios® Chewables for Horses support the balance of naturally occurring beneficial bacteria in the digestive system to help maintain healthy appetite and digestion. These apple-flavored probiotic chewables are for intermittent or supplemental feeding only.